Skid chain for motor vehicles



6 June 24, 1930'. v p', JACKSON ET AL 1,767,366

;SKID CHAIN FOFMOTOR VEHICLES Filed July 27, 1928 2 sheets-sheep 1 vVENTO S.

Ill

June 24, 1930. H, D. JACKSON ET AL SKID CHAIN FOR MOTOR VEHICLES 1 FiledJuly 27, 1928 2 Sheets-Sheet 2 VEN TOPS, 17.0. JAG/(saw F. WH/ TEPatented June 24, 1930 HEHBER'EEIJAVIDJACKSONfAND FRANK'WHITE;--Q'F"WALSAI:L,, ENGLAND -sxmdcnminaronimorflomvEHIcLEsApplicationifiled my 27, 19:28 Se ria1 n. 295;?62; andtin, area BritainNoireihber 23, 1927. F;

This inyenion; relates to improvements in. skid chains for niotoi"ehiclesf and refe s. particularly t'o skid chains 'for use on"- the 1twin wheels e'inployedon heavy vehicles fsi ch as motorbmnibuses'.

Various forms-of skid cliains -li'ave beenp -fo'posedglblut each formhasvcertain definitei limitations in its usean'd adaptab'illty, and" p atwin wheel, or a wheel'havingtwin pneu inatic tyres, presents a ,dlfiicilt' problem owingto the fact that thereisjfrequentlyinsufii cientclearance between the inside of the inne' tyre and the spring toallc'n'w of theuse of achain passing round the rim and tyres;

1'5- Further, a continuous type ofchain" en'- circling the wheel is notsuitable, as to fit the chain it is necessary. to, jack up the wheel andthis takes vehicle. V

an iinproved 'form of skid chainwhich can be ra idlyandeaSiIy fittedtoanytwin wheel without jackingit up, and which is notafa fected" by *lackofclearance ontlie inner side of the wheel. a p I V V Our invent-ionCOIDPIISQS a skid chainyhavingat one endan expanslble anchorage mem'bP'WllldI canbe collapsed to drop between the' adj ac'ent rims of thetwin wheel and then 3'0- expanded to" lock behind theriin's-wor' partsassociated-"therewith, so' that it cannotbe withdrawn by the pull of thechain which is ada ted to be stretched ronndthe tyreon the *outer rimand? "secured at its other end to theouterface of the wheel inanyconVenient-inanner 'Any number of such chains-may bgeihployed onawheel and if desired each anchorage member" may carry two or morechain'stveryv easily fitted by-the d'riye'ri of a vehicle" shouldadverse read conditions be eiieoun- V ter'ed, andvery little time isrequired for: the

. pelfspectivefront" elevation expanded.

a considerable time with a heavy The object of our invention isto'pr'o'vide It will be obvious thatthese' chain's can be .v Yunderg'iailit y and will fall out: The collapsible anchorage membermaybemembers areillustrat'ed in the accompanying andcol'lapsedr V a v o v V'Figiires 7', 8 and"9 "are "views of another Erin-showing respectivelythe inelnberfin' side'elevation wuapsedan'a expanded and in a w 0 5*'Figmes- 10 and 1-1- are side elevations of" antither' foifni collapsed.and exp ndedi Figures 12 and, 13 are side 'elevations 'of another} form]expandedandrcollapsed. I

iAs 'shown' in Figure l' 'the' twin wheel incommon use onmOtoY-O'mni'buses and other heavy vehicles has two tyres 1, lcarriedfbyspaced [rims 2, 2 on wheel discs 3', 3 which are secured tothe hub or"brake-drum by bolts 4'. Our improved form" of skid chain as ap: pliedto, such wheels consists olfa collapsible anchoragegnieinber 5 which canbe collapsedf' anchorage plate 7 which is retainedby one of thefusiialwheelf retaining bolts 45. p s V I To remove any chain itsouter'en'd is disconnected and thean'chorage member is either collapsedn echanically to allow it to be withdrawn from between the rin1s,"or thechain and anchorageinieinbei" are slipped roiind ftowards the bottom oftlieiwheellwhen the an char-age member will collapse automatically 1 1Aformof anchorage member-which collapses autolnatically when; invertedfexcept when the pull 'of a chain" is applied, is il-lu'sc trat'ed "inFigUFesQ; 3 and l. thisiormi two stoiitipl'ates 8, 8 are hinged-togetherand 10'!) eb V V in Figure 7. Pivoted on aspindle 21 passfor a chain atits upper end and a head 13 at its lower end.

l/Vhen this device is passed downwardly between the rims of a twin wheelthe two plates will fold together as shown in Figure 2,

and after passing the nearest edges of the rim the plates will fallapart again so that the device cannot be withdrawn by the tension of thechain. To remove the device, after the outer end of the chain has beendisconnected, the device is slipped round towards the bottom of thewheel when the plates being inverted will fall together and the devicewill drop out. w

In the form shown in Figures 5 and 6 plates 14, 14 are pivoted at thelower ends of a bent sheet metal member 15. A rod 16 having a ring atits outer end for the attachment of a chain slides through the member 15and has at its lower end a U-shaped trough 17. In the normal position,Figure 5, the trough engages the inner edge of the plates 14 and holdsthem extended. To collapse them the trough is turned through 90 andpulled up by the rod 15. The trough then engages the plates outsidetheir pivots and positively collapses them together as shown in Figure6. In the extending movement gravity is assisted by the rotation of therod 15 when a transverse pin 18 on the rod between the plates 14 forcesthem apart.

In the form shown in Figures 7, 8 and 9, the anchorage parts areformedby cranked ends 19 of a spring steel U member 20, the ends ofwhich are normally close together as shown ing through the U member is abar 22 having at its lower end a cam or wedge 23 and at its upper end aneye 24 for a chain. The device is expanded by turning the bar 22 on itspivot to force the wedge between the limbs of the U member. The upperend of the bar in this position enters a slot in the base of the Umember as shown in Fig. 9 so'that the chain has a direct pull.

In the form illustrated in Figures 10 and 11, a bar 25 has an eye 26 atthe upper endfor a chain and at the other end has an outwardly crankedlug 27. A shorter bar 28 having an oppositely cranked lug 29 is hingedat its .upper end to a cross-member 30 which is secured to the bar 25 insuch a manner as to allow a limited rocking movement. Wedge pieces 31are secured on or are integral with the inner faces of the bars, andworking between them is a distancepiece 32'which is rotatably carried bythe lower end ofa rod 33 and has guiding ears fitting over the bars. Therod is screw-threaded at its upper end where it passes through thecross-member 30 and has a hexagon head for turning it with a spanner.When the rod is screwed down the distance-piece forces the bars 25 and26 apart as shown in Figure 11, and when it is drawn up the bars areallowed to collapse together as shown in Figure 10.

In the form illustrated in Figures 12 and 13 two heavy wedge-shapedmembers 34 are connected together at their ends by links 35 and each isconnected by links 36 to the ends of a U member 37 through which slidesa rod 38 having an eye 39 at its outer end for the attachment of achain. The lower end of the rod passes between the members 34 which arecut away to allow this and there is a head 40 on the lower extremity ofthe rod. When the rod is pushed down through the U member the members 34can collapse together as shoWn in Figure 13 toallow the device to beinserted between the ribs of a twin wheel. lVhena pull is applied to therod 38 by the chain the head 40 bearing against the inner edges of themembers 34 forces them into the extended position shown in Figure 12 andthey will remain in this position until the rod 38 is released again.

These forms of collapsible member are de scribed as examples only andobviously various other forms may equally well be employed.

Claims:

l 1. A skid chain for twin wheels of motor vehicles comprising acollapsible anchorage. member adapted to fit between the rims of thetwin wheel, a chain secured-at one end to the anchorage member andpassing over the tyre on the outer rim, and means for retaining theother end of the chain on the outer face of the Wheel. i

2. A skid'chain for twin wheels of motor vehicles comprising acollapsible anchorage member adapted to passbetween and expand behindthe rims of a twin wheel, said anchorage member being formed by a pairof hinged plates mounted on a body part, a chain secured at one end tothe body part, and passing over the tyre on the outer rim of the wheel,and means for retaining the other end of the chain on the outer face ofthe wheel.

3. A skid chain for twin wheels of motor to be passed between adjacentedges of the rims of the twin wheel and will fallpart to engage behindthe rims against whichthe plates are held by the pull of the'chain'.

4. A skid chain for tWin Wheels of motor Vehicles comprising a chainpassing over a tyre on the outer rim of the twin Wheel, means 7 foranchoring one end of the chain on the outer face of the Wheel, and acollapsible anchorage member for the other end of the 6 chain, saidanchorage member-comprising 'a rod towhich the chain is attached and apair of stout plates hinged together andslidably mounted on a reducedneck on the rod adjacent to an enlarged head, the plates having stops bywhich When they fallapart under 7 gravity they are retained in aposition in which they are substantially in line.

HERBERT DAVID JACKSON. FRANK WHITE. V

